Table 2.
Summary of the systematic review of studies, comparing limited (D1) and extended (D2) lymphadenectomy and published in 2008-2012 on journals indexed by Journal Citation Reports. Articles were weighted according to 5-year impact factor (2008-2012)
| Authors | Country | Journal | Year | Study design | 5-yr IF |
| Further studies | Further studies needed | ||||
| Catalano et al[40] | Italy | Crit Rev Oncol Hematol | 2009 | Expert opinion | 4.562 |
| Coburn[41] | Canada | J Surg Oncol | 2009 | Review | 2.710 |
| D’souza et al[42] | India | J Cancer Res Ther | 2009 | Review | 0.7611 |
| Songun et al[43] | The Netherlands | Expert Rev Anticanc | 2009 | Expert opinion | 2.055 |
| Yoon et al[44] | United States | Oncologist | 2009 | Expert opinion | 5.245 |
| Coburn[45] | Canada | J Surg Oncol | 2010 | Expert opinion | 2.710 |
| de Bree et al[46] | Greece | J Surg Oncol | 2010 | Review | 2.710 |
| Degiuli et al[47] | Italy | Brit J Surg | 2010 | Clinical trial | 4.956 |
| Tanizawa et al[48] | Japan | Gastric Cancer | 2010 | Review | 3.615 |
| Maduekwe et al[49] | United States | J Gastrointest Surg | 2011 | Review | 2.766 |
| Doglietto et al[50] | Italy | Ann Ital Chir | 2012 | Expert opinion | 0.286 |
| Hundahl[51] | United States | Surg Oncol Clin N Am | 2012 | Review | 1.162 |
| Vallbohmer et al[52] | Germany | Curr Prob Surg | 2012 | Expert opinion | 2.267 |
| Overall | 35.805 | ||||
| D2 not favoured | D2 not favoured over D1 | ||||
| Lustosa et al[53] | Brazil | Acta Cir Bras | 2008 | Meta-analysis | 0.695 |
| Van Cutsem et al[54] | EORTC2 | Eur J Cancer | 2008 | Expert opinion | 5.257 |
| Yang et al[55] | China | Am J Surg | 2009 | Meta-analysis | 2.727 |
| Memon et al[56] | Australia | Ann Surg | 2011 | Meta-analysis | 8.264 |
| Wong et al[57] | United States | Curr Treat Option On | 2011 | Expert opinion | 2.4221 |
| Overall | 19.365 | ||||
| D2 favoured | D2 favoured over D1 | ||||
| Ozmen et al[58] | Turkey | J Surg Oncol | 2008 | Review | 2.710 |
| Díaz de Liaño et al[59] | Spain | Clin Transl Oncol | 2009 | Observational | 1.316 |
| Griniatsos et al[60] | Greece | World J Gastroenterol | 2009 | Observational | 2.594 |
| Kodera et al[61] | Japan | Acta Chir Belg | 2009 | Review | 0.499 |
| Roy et al[62] | India | Indian J Surg | 2009 | Review | 0.0921 |
| Sasako et al[63] | Japan | Jpn J Clin Oncol | 2010 | Expert opinion | 2.063 |
| Shi et al[64] | China | J Surg Oncol | 2010 | Review | 2.710 |
| Songun et al[65] | The Netherlands | Lancet Oncol | 2010 | Clinical trial | 21.856 |
| Tentes et al[66] | Greece | J BUON | 2010 | Observational | 0.653 |
| Hussain[67] | United Kingdom | Curr Opin Gastroen | 2011 | Expert opinion | 3.739 |
| Meyer et al[68] | Germany | Dtsch Arztebl Int | 2011 | Expert opinion | 2.988 |
| Ott et al[69] | Germany | Langenbecks Arch Surg | 2011 | Review | 1.970 |
| Saka et al[70] | Japan | Jpn J Clin Oncol | 2011 | Review | 2.063 |
| Lee et al[71] | Korea | Yonsei Med J | 2012 | Review | 1.214 |
| Sasako[72] | Japan | Surg Oncol Clin N Am | 2012 | Expert opinion | 1.162 |
| Seevaratnam et al[73] | Canada | Gastric Cancer | 2012 | Meta-analysis | 3.615 |
| Viudez-Berral et al[74] | Spain | Rev Esp Enferm Dig | 2012 | Expert opinion | 1.208 |
| Overall | 52.452 |
1
2012 impact factor was used, as the 5-year impact factor was not available;
2
EORTC: European Organisation for Research and Treatment of Cancer.